Bed-motion for printing-presses.



PATENTED SEPT. 15. 1903.

R. MIEHLE. BED MOTION FOR PRINTING PRESSES.

APPLICATION FILED JULY 9, 1903.

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PATENTED SEPT. 15, 1903.

R. MIEHLE. BED MOTION FOR PRINTING PRESSES.

APPLICATION FILED JULY 9. 1903.

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R. MIEHLEL. BED MOTION FOR PRINTING PRESSES.

APPLICATION FILED JULY 9, 1903.

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APPLICATION FILED JULY 9, 1903.

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NITED STATES Patented. September 15, 1903.

ROBERT MIEHI E, OF CHICAGO, ILLINOIS.

BED-MOTION FOR PRINTING-PRESSES.

SPECIFICATION forming part of Letters Patent No. 738,829, dated September 15, 1903.

Application filed July 9, 1903. Serial No. 16 4,777. (No model-l T at whom it may concern.

Be it known that I, ROBERT MIEHLE, a citizen of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented a newand useful Improvement in Bed-Motions for Printing-Presses, of which the following is a specification,

This invention has been devised more especially for use in small or pony bed-and-cylinder presses and is a simplification and adaptation to such presses of the bed-motion mechanism shown in my Patents No. 317,663, of May 12, 1885, and No. 322,309, of July 14, 1885, and now generally known as the Miehle movements.

The nature of the improvement and the details thereof are fully set forth below and also illustrated in the accompanying drawings, in Which Figure 1 is a side elevation, partly broken away, of the invention. Fig. 2 is an end elevation, also partly broken away. Fig. 3 is a Fig. 4: is a partial transverse vertical section. Fig. 5 is a partial horizontal section. Figs. 6, 7, and 8 are detail views showing the mechanism in dilferent positions.

In said drawings, 10 represents the supporting-frame of the press; 11, the drive-shaft; 12, the drive-pulley, and 13 the balance-wheel. The shaft 11 carries a pinion 14, meshing with a gear 15 on shaft 16, and gear 15 meshes with a gear 17 on the journal of the impressioncylinder 18.

19 is the reciprocating type-bed, carrying a depending rack-frame 20, fixedly secured to it. The rack-frame is provided with an upper rack 21 and a lower rack 22, both in the same vertical plane and facing each other. A toothed segment 23, fast on shaft 16, rotates in the vertical plane of the racks and engages them alternately, thus driving the bedin both directions. The segment has substantially the same number of teeth as the racks, and is thus adapted to carry the bed back and forth through its prescribed length of movement. It will be noted that there is no shifting of either the racks or the actuating-segment, allof them moving in the same plane and that plane being fixed. For controlling the bed in reversing at the ends of its stroke I provide the segment 23 with a wrist-pin 24 and the rack-frame with two curved guideslots 25 and 26, formed between the central or interior shoes 27 and the outer shoes 28. These slots are arcs of true circles (preferably larger than the circle described by the segment) instead of being irregular or straight, as shown in my Patents Nos. 317,663 and 322,309. They are connected at the top and bottom by the open spaces 29 and '30. The wrist-pin enters the slots as the segment leaves the racks and moves out of them as the segment commences engagement with the racks. It is shown at Fig. 8 as just entering slot 26 at the top and in Fig. 6 as just emerging from the top of slot 25. In Fig. 7 the pin is in the connecting-space 29, this being its position when the bed is midway between the extremes of its stroke. At Fig. 3 the pin is shown in slots 25 and in the act of reversing the bed, which function it performs while the segment is moving from one rack to the other. The pin is enabled by the curvature of the slots to first slow down the motion of the bed to a full stop and then to gradually start it in the reverse direction. The action is the same as that described when the segment engages the lower rack, the wrist-pin then emerging from one slot into space 30 and entering the other slot at the bottom instead of the top. 111 order that the segment may not destroy the balance of the shaft 16, I-apply a weight 31 to the gear 15 at a point diametrically opposite the segment. The guide slots shown have no movable sides or gates which must move out of the way of the wristpin at each stroke of the press, and as the racks and segment move in a fixed plane it will be seen that my improved press is very simple and little likely to get out of order.

I claim 1. The combination with the reciprocating type-bed, of companion racks fixedly attached to the bed and facing each other in the same vertical plane, a toothed segment rotating in the plane of the racks and engaging them a1- ternately, and means whereby the segment causes the reversal of the bed at the ends of the strokes.

2. The combination with the reciprocating type-bed, of companion racks fixedly attached to the bed and facing each other in the same vertical plane, a toothed segment rotating always in the plane of the racks and engaging them alternately, and means whereby the segment causes the reversal of the bed at the ends of its strokes.

3. The combination in a printing-press with the reciprocating type-bed, of a depending frame attached to the bed and having upper and lower racks in the same vertical plane and opposite each other, a toothed segment rotating in the plane of the racks and engaging them alternately, a wrist-pin carried by the segment, and guide-slots carried by the frame and traversed by said pin..

4. The combination in aprinting-press with the reciprocating type-bed, of a depending frame attached to the bed and having upper and lower racks both stationarily attached to the bed one above the other in the same vertical plane, a toothed segment rotating in the plane of the racks and adapted to engage them alternately, and means for reversing the bed while the segment is moving from one rack to the other.

5. The combination with the reciprocating type-bed, of companion racks fixedly attached to the bed and facing each other in the same vertical plane, a toothed segment rotating in the plane of the racks and engaging them alternately, a wrist-pin carried by the segment, and curved guides carried by the bed with which the pin engages to reverse the bed.

6. The combination with thereciprocating type-bed, of companion racks fixedly attached to the bed and facing each other in the same vertical plane, a toothed segment rotating in the plane of the racks and engaging them alternately, arc slots 25 and 26 formed on a depending part of the bed, and a wrist-pin carried by the segment and traversing said slots during the reversals.

7. The combination with the reciprocating typebed, of companion racks fixedly attached to the bed and facing each other in the same vertical plane, a toothed segment rotating in the plane of the racks and engaging them alternately, arc slots 25 and 26 formed on a depending part of the bed and connected by spaces 29 and 30, and a wrist-pin carried by the segment and traversing said slots during the reversals and moving through said spaces while the segment is engaging the racks.

8. The combination in a printing-press of a reciprocating type-bed, a rotating cylinder, companion racks facing each other in the same vertical plane, and fixedly attached to the bed, a toothed segment rotating in the plane of the racks and engaging them alternately, arc slots 25 and 26 formed on a depending part of the bed and receiving the wrist-pin, and gearing for driving the cylin der and the segment.

9. The combination with the type-bed and the facing racks carried thereby, of a toothed segment meshing with the racks alternately, and a driving-gear on the same shaft with the segment, said gear being weighted at- 31 to balance the weight of the segment.

ROBERT MIEHLE. 

